Sheet-cutting machine.



H. DE SMITH. SHEET CUTTING MACHINE. APPLIOATIOH FILED DEO.19, 1908.

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H. DE SMITH. SHEET CUTTING MACHINE. APPLICATION FILED DEC. 19, 1908.

Patented Sept. 17, 1912.

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H. DE SMITH.

SHEET CUTTING MACHINE.

APPL IUATION FILED 13110.19, 1908. 1,038,860.

ATTORIVE Y Patented Sept. 17,1912.

3 SHEETS-4331GT 3.

' kinds and weights UNITED STATES PATENT OFFICE.

HENRY DE SMITH, OF ROGHESTEB, NEW

YORK, ASSIGNOR TO M. D. KNOWLTON COM- snnE'r-ou'r'rme mncrrmn.

Specification of Letters Patent.

Patented/Sept. 17,1912.

Application filed December 19, mos. sermuwo. 468,820.

To all whom it ma concern:

Be it known t at I, HENRY Dr: SMITH citizen of the United States, and resident of Rochester. in the county of Monroe and State of New York, haveinvented certain new and useful Im rovements in Sheet- Cutting Machines, '0 which the following, is a specification.

This invention relates to sheet-cutting machines for severing roll-stock of various of material into. sheets of any desired length, and the special object. of the invention is to provide in a machine of this kind means for taking out the curl in theroll stock before it is severed into sheets.

It is well known that paper, card-board and other materials which arewound up in single lengths into the form of rolls become set in a short time and take a curved form, the set of the material being particularly marked when the material has been rolled up for a considerable length of time. Much difficulty has been "experienced with roll stock when out into sheets owing to the fact that the material retains this curvature and is usually delivered as cut sheets curled more or less and correspondingly difiicult to handle.

The present invention is based upon the fact that the curvature of asheet of paper 'ing off or other material that has been rolled up can be most readily taken out byybending or rolling it in a direction op osite to that in which it was rolledoriginally, and the present improved sheet-cutting machine is provided with means for performing a substantially similar 0 eration on a web passing off from a roll. The preferred means emloyed for the purpose is a straight-edge in contact with a roll and so located as to make with the roll and with the web passfrom the roll such angles as will assure the taking out of the curl in the paper, and the consequent straightening of the same, so that the sheets when severed from the web will lie flat. In connection with a device for taking out the curl from such roll-stock means are also preferably. provided for adjusting the position thereof so that it may be readily adapted for different kinds of stock, and also means for maintaining the device in contact with the roll as the diameter ,of said roll decreases.

In the drawings-Figure 1 is a side elepassing off from a change-gearing is 'vation of a sheet-cutting machine embodying a device suitable for taking out the curl inroll-stock as it passes off from a roll, and illustrates the parts in one position, with a full roll. Fig. 2 is asimilar view showing the parts in another. position and cooperating with a roll that has been almost completely unwound. Fig. 3 is a view similar to that of Figs. 1 and 2 showing a slightly modified embodiment of'the inventlon. F i 4 is a partial plan view of the machine s own in Fi 3.

Similar characters designate like parts in all the figures of the drawing.

The present invention may be embodied in any usual or suitable type of s heet-cuttin machine. The drawings illustrate a -wel known machine of this class havin the usual framework, designatedv general y by 2, from opposite ends of which project extended frames of brackets 3 and. 4, the extension 3 serving to support a roll-holder 5, preferably adjustable, while the extensional supports suitable conveying means, such as the endless belt 6, for receiving and carrying off sheets cut from a continuous web roll, such as 7, carried by said roll-holder. The web delivered from this roll is indicated at 8 and passes throu h suitable feeding and cutting mechanism, a so of well-known construction for severing the web into sheets of the All of the operating mechanism may bedriven, as usual, from a main shaft 9, from which by suitable gearing, the pitch-lines of which are indicated, a rotary cutter 10 is illustrated as actuated, and also a pair of feed-rolls 11 and 12. The conveyer 6 is illustrated as driven directly .from the shaft 9. In one type of sheet-cutting machines of this class it is customary to provide change-gears for determining the length of the sheet to be cut from the web that is unwound from the roll, and such illustrated in the drawings. Fixed gears, such as 13 and 14, may be used on the driven shafts of the cutter :and the main feed-roll, these shafts being indicated at 15 and 16. for operating the gears 13 and 4 may carried by an adjustable swinging frame,

such as 17, also of well-known construction,

which may be set 1n suitable position to bring any desired set of gears, such as the The chan e-gearmg gearing designated generally by 18, into 110 so i esired length.

' with the roll of stock and the line of dej the fibers and restore them and the v out the curl of the material operated, upon kinds of materials. Here the straight-edge the feed-rolls and passesthence over a fixed 20 rolls, and it has been found that the desired terial is illustrated as embodying as its 'the paper passes'and which is in contact corresponding to the differentkinds of maerat-ive relation with the driven gears of lie cutter and the feed-rolls. The line of travel of the paper as it passes ofi from the roll 7 is. clearly indicated in the sec with the roll as the diameter of the same decreases,- so as to assure the web being drawn over said straight-edge under proper tension to remove the curl therefrom. A

drawings. It is drawn ofi" from the roll byte-power device will preferably be employed cutter l9 cooperative with the rotary cutter 10, the web being severed at the edge of the fixed cutter 19 in the usual manner and, falling onto the conveyer 6, by which it is carried to a suitable receiver or bank (not shown). i

At some suitable point after it leaves the roll the web of paper is subjected to the action of means for taking out'the curl in the web due to keeping thepaper in roll form for a considerable period of. time. This device will preferably operate at a point between the roll of stock and the feedresult can be accomplished by simply'pass' ing the web over a straight-edge properly located and positioned at such an angle as may be necessary for the particularmaterial that is to be cut and straightened. The straight-edge is usually brought into contact parture of the paper from the roll and from the straight-edge is at such an angle opposite to the angle of set, as will remove theset of 8. er itself to their natural straight con 1t10n. The device shown in Figs. 1 and 2 of the drawings for taking out the curl of the mamain element a straight-edge 20 over which with the outer side of the web passing off from the periphery of the roll. At its outer side the web of paper is bent over this straight-edge at a considerable angle, the angle being sufficient in all cases to overcome the curvature or set of the material. This angle will of course vary with difi'erentmaterials, and the means employed for taking should therefore be adjustable for'difierent 20 is carried .by an arm 21 and is pivoted at- 22, the pivot being adjustable in a slot 23 in the extension 3 of the framework. ,For the purpose of shifting the straight-edge and its carrier-arm 21, suitablemeans, such as the angularhand-lever 24, may be provided. A clamp-nut 25 or any other suitable means may be employed for holding the straight-edge and the arm 21 in any desired adjusted position.

In addition to providing-for the adjustment of the device 20 todifi'erent positions terials to be straightened, means should also be provided for maintaining the straight edge, or other element used for the purpose of taking out the curl, in operative relation ried by the long arm of an angle-lever 27 pivoted on the main framework 2, the short arm of the angle-lever being pivotally connected with the carrier-arm 21 of the straight-edge 20, .as by a link 28. It will be: clear that in descending from the positionshown a substant-iallyconstant pressure will be exerted on the straight-edge to maintain it in contact with the periphery of the roll 7-as it gradually approaches the center of the roll.

By means of the construction just described not only can any desired angular po sition of the straightedge, within limits, beobt-ained to correspond to the stiffness, weight, etc. of the material to be straightened out, but the angle made by the straightedge between the periphery of the roll and the web passing off therefrom may also be maintained practically constant from the beginning to the end of the unwinding of any given roll. It has been found in practice that by means of these devices adjustments may be obtained which permit of the straightening of a great many varieties and weights of material put up in roll form and requiring to be cut into flat sheets.

Referring now to Figs. 3 and 4; of the drawings, illustrating a slightly different embodiment of .the invention, the straightedge 20, instead of being supported for contact with the stock roll 7, is shown asbeing located at a point distant from said stock roll, and an additional or second pair of rolls 30, 31, are shown'as being mounted on the machine at a point between said straightedge and stock roll for engaging the web 8 and cooperating with the feed rolls in cansing said web to feed over the straight-edge under proper tension to remove the curl. In this case the straight-edge is shown as being vertically adjustable between the oppositel located pairs of rolls in order to cause t e web in passing thereover to assume any desired angleopposite to the angle of set, according to the difierent kinds of material to be straightened. Such adjustment I of the straight-edge is provided for in the I, present case by supporting the straight-edge f at each end on a slidably mounted block 32 which is vertically adjustable by anengaging screw 33.

The tension of the web in passing over the straight-edge between the two pairs of rolls should also preferably be capable of adjustment, and this is provided for in the ent embodiments of my invention, I do not present case by attaching a friction disk 34 on the shaft 35 of the tension roll and causing it to; yieldingly bear with more or less pressure against a cotiperating stationary frictiondisk 36 on the frame of the machine by means .of a spring 37 and adjustmg nut 38, as clearly shown in Fig. 4. 7 While I have shown and described differwish to be understood as confining myself to the details of construction which I have disclosed, for it is obvious that considerable latitude within the skill of a mechanician may be indulged in without departing from the principlesof my invention, and as all such obvious changes are within the purview of my invention, I do not limit myself to anything shown and described except-so far as I am limited by the prior art to which the invention belongs. Furtherm ore,while I-have shown and described my invention as applied to a sheet cutting machine, I do not wish to be understood as limiting myself to such application of the invention, 'as it is obvious that it maybe equally applicableito,

- or for'use in connection with, other machines using roll stock from which it may be desired to remove the curl.

The term straight-edge 7 as used throng out the description and in the following claims is intended to. cover any device or element, whether stationary or movable,having a straight line surface of any suitable area, and adapted to perform of the so-called straight edge herein shown and described.

,What I claim is: 1 s

1. In a sheet'cutting machine, the combination with a roll holder, of feeding means for drawing off a continuous web from a means for cutting and means engaging of said web and deflecting the same out of line with the normal path of the web at one point for taking out the curl in said web before it is severed said web into sheets,

into sheets.

2. In a sheet cutting machine, the 'combi: nation with a roll holder, of feeding means for drawing off a continuous webhfrom a roll on said roll holder, means for cutting said web into sheets, mieansbetween the'roll holder and said feeding means engaging theouter face of the web and holding it out of line with respect to its path between the roll holder and the feeding means for taking out the curl in said web, said means able whereby to accommodate webs varying in thickness and to insure the taking out of the curl of the same.

3. In a sheet-cutting machine, the combination with a roll-holder, of feeding means for drawing off a continuous web from a roll on said roll-holder, means for cutting said web into sheets, a device for taking out the n roll on-said roll-holder,

, web before it means for maintaining said straight-edge in contact with said roll asthe diameter of the being adj ustcurlin said web befoi'e it .issevered into sheets, and means for maintaining said device in contact with a rollon said roll-holder. 4.9In a sheet-cuttin machine, the combination with a rolll-hol er, of feeding means for drawing off a continuous. webfroma means for cutting saidweb into sheets, and a straight-edge in position to engage the outer side of the web passing off from aroll on\ said roll-holder and form therewith an angle sufiicient to take out thecurl in said web before it 5 is severed into sheets. I

5. In a sheet-cuttin machine, the combi naltion with a roll-hol er, of feeding means for drawingofi' a continuous web from a roll on said roll-holder, means for cutting said web into sheets, and a straight-edge in posi tion to engage the periphery of aroll on l the roll-holder and form with the web pass ing off from said roll an angle suflicient to p take out the curlin. said web before it'is severed'into sheets. p

6. In a sheet cutting machine, the combil nation with a roll holder, of feeding means for drawing of n roll on said roll holder,

a continuous web from a means for cutting said web into sheets, a device engaging the outer face of said web and deflecting it out of line relative. to the normal path of the web to take the curl out of the same, means for adjusting said device relative to y the degree of curl of the web.

the function nation w1th a roll-holder, of feeding means for drawing off a and 7. In asheet-cutting machine,

continuous web from a roll on said roll-holder, means for cutting said web into sheets, a straightedge in position to engage the outer side of the web passing off from a roll -.on said roll-holder and form therewith an angle suificient to take out the curl in said is severed into sheets, and

roll decreases. v 8. In a sheet-cutting machine,'the combiroll on said roll-holder, means for cutting said web into sheets, a straight-edge in position to engage the outer side of the web passing off from a roll on said roll-holder. and

form therewith an angle suflicient to take out the curl in said web before it is severed into sheets, and means for maintaining said straight-edge in contact, and at substantially the combination with a roll-holder, of feeding means for drawing off a continuous web from a the same an le, with said roll as the diameter of the ro 1 decreases.

9. In a sheet-cuttin machine, thecombination with a roll-ho der, of feeding means for drawin off a continuous web from a roll on said r0 -holder, means for cutting said web into sheets, a straight-edge in position to engage the outer s1de of the web passing 10. In a sheet-cutting machine, the combi- I nation with" a roll-holder, of feeding means for drawing off a continuous web from a roll on said roll-holder, means for cutting said web into sheets, a pivoted device for taking out the curl in sald web before it is severed into sheets, and means for maintaining said device in contact with a roll on said roll-holder.

11. In a sheet-cuttin machine, the combination with a roll-hol er, of feeding means for drawing ofl a continuous web from a roll on said roll-holder, means for cutting said web into sheets, a pivoted device. for taking out the curl in said web before it is severed into sheets, and power means for gradually-turning said device on its pivot to maintain'it incontact with said roll as the diameter of the roll decreases.

12. In a sheet-cuttin machine, the lcombi nation with a roll-hol er, of feeding means for drawing off a continuous web from a roll on said roll-holder, -means for cutting said web into sheets, a straight-edge in position to engage the outer side of theweb passing off from a, roll on said roll-holder and form therewith an angle sufiicientto I web before it is take out the curl in said severed into sheets, and means for adjusting said straight-edge to-change said angle.

13. In a sheet cutting machine, the combination with a roll holder, of feeding mean for drawing off a continuous web from roll on said roll holder, means for cutting said web into sheets, and an adjustable device'engaging at one pointagainst theouter face of said web and deflecting the latter sufiiciently out of line from the normal path of the web to take out the curl in said web.

14. In a sheet-cutting machine, the combination with a roll-holder, of feeding means for drawing off a continuous web from a roll on said roll-holder, means forcutting said web into sheets, means for engaging said web before it is severed into sheets and bending it solely in a direction opposite its direction of'curl in the roll, and means for adjusting the position of said web-engaging means, for the purpose set forth.

15. In a sheet cutting machine, the combination with a roll holder, of feeding means for drawing ofi a continuous web from a roll on said roll holder, means for cutting said web into sheets, and a single edged device engaging the outer face of the Web and defleeting the same fromtits normal path sufficiently for taking out the curl in the web;

16. In a sheet-cutting machine, the combination with a roll-holder, of feeding means for drawing off a continuous web from a roll on said roll-holder, means for cutting said web into sheets, means for engaging said web before it issevered into sheets and bending it solely in a direction opposite its direction of curl in the roll, and means for adjusting the tension of the web in its engagementwith said web-engaging means, for the purpose set forth.

17. In combination, a roll-holder, feedin means for drawing off a continuous we from a roll on said roll-holder, means engaging said web and bending it solely in a direction opposite its direction of curl in the roll, and means for adjusting the position of said web-engaging means, for the purpose set forth.

18. In combination, a roll-holder, feedin means for drawing ofl" a continuous we from a roll on said roll-holder, means for engaging said Web and bending it solely in a direction opposite its direction of curl in the roll, and means for adjusting the tension of the web in its engagement with said web-engaging means, for the purpose set forth.

Signed at Rochester, in the county of Monroe, and State of New York, this 12th day of December, A. D. 1908.

. HENRY DE SMITH; Witnesses:

DENNIS CHURCH,

O'rro SANGER. 

